Files Often when implementing network algorithms such as servers, it is necessary to interact with files on the system. Beast defines the __File__ concept and several models to facilitate cross-platform interaction with the underlying filesystem: File Types Name Description [link beast.ref.boost__beast__file `file`] `file` is a type alias to one of the following implementations, depending on what is available on the target platform. [link beast.ref.boost__beast__file_stdio `file_stdio`] This implementation of __File__ uses the C++ standard library facilities obtained by including `<cstdio>`. [link beast.ref.boost__beast__file_win32 `file_win32`] This implements a __File__ for the Win32 API. It provides low level access to the native file handle when necessary. [link beast.ref.boost__beast__file_posix `file_posix`] For POSIX systems, this class provides a suitable implementation of __File__ which wraps the native file descriptor and provides it if necessary.